Module: Currency

Defined in:
lib/currency.rb,
lib/currency/version.rb

Constant Summary collapse

VERSION = 
'1.0.3'

Class Method Summary collapse

Class Method Details

.extract_rate(html) ⇒ Object 



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# File 'lib/currency.rb', line 11

def Currency.extract_rate(html)
  if(match = /\<span class=bld\>(\d+\.\d+) \w+\<\/span\>/.match(html))
    match[1]
  end
end

.get_html(origin, target) ⇒ Object 



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# File 'lib/currency.rb', line 16

def Currency.get_html(origin, target)
  url = "https://finance.google.com/finance/converter?a=1&from=#{origin.upcase}&to=#{target.upcase}"
  @data = URI.parse(url).read
  return @data
end

.rate(origin, target) ⇒ Object 



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# File 'lib/currency.rb', line 21

def Currency.rate(origin, target)
  origin = origin.to_s.upcase[/^[A-Z]{3}/]
  target = target.to_s.upcase[/^[A-Z]{3}/]
  return 1.0 if(origin == target)
  @rates[[origin, target]] \
    || ((rate = @rates[[target, origin]]) && (1.0 / rate)) \
    || update_rate(origin, target)
end

.run_updater ⇒ Object 



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# File 'lib/currency.rb', line 29

def Currency.run_updater
  Thread.new { 
    loop do
      update
      sleep(24*60*60)
    end
  }
end

.update ⇒ Object 



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# File 'lib/currency.rb', line 37

def Currency.update
  @rates.each_key { |pair| update_rate(*pair) }
end

.update_rate(origin, target) ⇒ Object 



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# File 'lib/currency.rb', line 40

def Currency.update_rate(origin, target)
  if(rate = extract_rate(get_html(origin, target)))
    @rates[[origin, target]] = rate.to_f
  end
end